PLATE 11. 
Fig. 1. 78. 8. ORTHOCERAS MULTICAMERATUM. (Pag. 465.) 
1. A fragment twelve inches long, showing a large part of the deep outer chamber, which is partially filled 
with fragments of the Phytopsis (See Plate 9). 
1 a. Another fragment, showing the continuation of the fossil to the apex. These two were not found in con- 
nexion, but are apparently fragments of two individuals. 
1b. A fragment showing some irregularity in the septa. 
1c. A worn specimen, showing the septa and siphuncle, which is near the margin (ventral? ). The siphon, 
in one place, shows something like an enlargement between the septa as in Ormoceras ; but it is too 
indistinct to warrant its reference to the latter genus. 
Fig. 1 d. 79. 9. ORTHOCERAS RECTICAMERATUM. (Pag. 46.) 
